Crank motion for steam engines and the like



Aug. 30, 1949. c. TISELL 2,480,273

CRANK MOTION FOR STEAM ENGINES AND THE LIKE Filed Nov. 13, 1944 Fig.5. \43 5! INV NTOR lmrles TZ'SeZ dece'used grammegxma 3 Patented Aug. 30. 1949 CRANK MOTION FOR STEAM ENGINES AND THE LIKE Charles Tisell, deceased, late of Bronx, N. Y., by Gerda Tisell, executrix, Bronx, N. Y.

Application November 13, 1944, Serial No. 563,127

3 Claims.

This invention relates to new and useful improvements in a crank motion for steam engines and the like. v

More particularly, the invention proposes the construction of a steam engine which is characterized by a means arranged in connection with its piston rod for urging the rod in a proper direction in a manner to insure forward rotation of the engine when starting.

Still further the present invention proposes that the piston rod urging means be a resilient means for urging the crank portion to rotate in one direction past its dead centers, while starting the steam engine.

Another object of the invention is the construction of a device as mentioned which is simple and durable and which may be manufactured and sold at a reasonable cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective view of a steam engine constructed in accordance with this invention.

Fig 2 is an end elevational View of Fig. 1.

Fig. 3 is a fragmentary perspective view of the track portion of the vertical bracket, and the adjacent associated parts.

Fig. 4 is a fragmentary enlarged vertical sectional View taken on the line 4-4 of Fig. 1.

Fig. 5 is a side elevational view of the steam engine.

Fig. 6 is a fragmentary enlarged sectional view through one of the resilient means illustrated in the bottom portion of steam engine.

The steam engine, in accordance with this invention, includes a base In having a top recess Bearings l2 are mounted on said base In to the sides of said recess II. A crankshaft I3 is rotatively mounted in the bearings I2 and has its crank portion l4 engaging into and out of said top recess I! as the crankshaft rotates.

A flywheel I5 is mounted on one end of the crankshaft l3 to one side of the base l0. An eccentric cam H5 is mounted on the other end of the crankshaft l3 to the other side of the base It]. A vertical bracket I! is mounted on the back portion of the base Ill.

The vertical bracket I1 is provided with a vertical track I8, A slide I9 is vertically slidably mounted in the vertical track IS. A cylinder 20 is mounted on the top of the bracket l1. This cylinder 20 has recessed sides which are filled in with heat insulating material 2|. A metal jacket 22 is'engaged around the cylinder 20.

A piston 23 is slidably mounted in the cylinderv 2D. A piston rod 24 connects with the piston 23 and extends downwards and connects with the slide H]. A connecting rod 25 pivotally connects with the slide I9 and. with the crank portion [4.

A conventional slide valve 26 is slidably mounted in a steam chest 21 and controls the ports 28 and 29 to the top and to the bottom of the cylinder 20. Said slide valve also controls the exhaust port 30. The steam chest 21 is provided with an inlet 3|. The exhaust port 30 connects with a steam outlet 32. A' connecting rod 33 extends from said slide valve 26 and extends downwards and connects with the cam IS.

The steam chest 21 is closed by a cover 35. The 1 cylinder 20 is closed by a top cover 35 and a bot-.

tom cover 36. A flow cock 31 connects with the top cover 35, A brace 38 is mounted between the front portion of the base I0 and a bracket 39 mounted on the casing 22.

Means is associated with the bottom portion of the connecting rod 25 for resiliently urging the connecting rod in one direction past the dead centers of the crank H for insuring that the engin turns in the correct direction while starting. More specifically, the base I0 and bracket ll of the steam engine support horizontal cylinders 40.

Each cylinder 40 is provided with a piston 4| normally urged outwards by an internal spring 42. Each piston 4| connects with a piston rod 43 provided with a rigid head 44. One of the cylinders 40 is slidably mounted upon the bracket l1, and more specifically, through an opening 45 in said bracket II. The other cylinder 4|] is slidably mounted in an opening 46 in the base |0.. One of the cylinders 40 is supported on a block 41 mounted on a slidably mounted rack 48. The other cylinder 4|] is supported by a bracket 49 which connects with a slidably mounted rack 50.

The racks 48 and 5|] are opposed to each other and are engaged by a gear 5|. This gear 5| is connected with a handle 52 by which it may be manually turned.

In the position of the parts shown in Fig. 5 the heads 44 are in positions to resiliently engage against the bottom end of the connecting rod 25 for making certain that the engine runs in one direction. Assuming the engine to run counter-clockwise, as illustrated in Fig. 5, the bottom portion of the connecting rod 25 is press- 3 ing inwards against one of the heads 44 so that when it reaches the bottom of its stroke this head 44 will push it towards the right and so insure turning of the crank counterclockwise. As the bottom portion of the connecting rod 25 moves upwards, it will engage and press outwards the other one of-the heads M so-that when-itreaches the top end "of "its stroke this latter-" mentioned head will resiliently engage against it and move it counterclockwise.

After the engine gets started therflywheel will p it running in the correct direction;* Then the handle 52 is turned so as to move the racks'-- 48 and 50 to move the cylinders 40 outwards'intopositions in which the heads 44 are out of reach" of the bottom portion of the connecting rod 25.

The steam engine now will continue'ru'nning' with out engaging the heads 44.

The operation of the steam engine is conventionall -However; the construction embodiesnumerous advantages." .One advantage resides inthe' constructionof the'base l0. Another m the an rangement of the'verticalbracket f1 and'the inanner intwhich it supports the cylinderanother, in' the arrangement of the brace 38;

Still Further features reside mime arrangement and operation o flthe heads 44.

It is'to beunderstood-that"suitableelectrical drive means may also be provided for coupling the steam -engine to an electrical driving means;

While illustrate'dand'described is the preferred embodiment of the invention,'it is to be understood= that the invention is not limited to the precise constructions herein disclosed and the right isyreserved to all changes'an'd modifications" coming withinthe scope of .theinvention as de fined in the appended claims."

States: Letters Patent issl. The combinationwith a crank shaft having bearings-and a fly wheel-*and-apitman having one 7 end connected to the crank shaft to: turn the same; ofheadsdisposedon'opposite sides of the" connected-end of the pitman,---piston rods connectedwith said heads, cylinders in which'said piston rodsoperate, springs in said cylinders compressibleby-sa'id piston-rods, a -gear rack connectedwith each cylinder, and a manuallyturne'd gear between the. gear racks to permit of the inanual shifting 'of the heads to control the direction of rotation of theicrank'shaft and to permit the.

displacement of the heads from engagementwith the pitmanw. t.

2. In tcombination with an engine havinga crankshaft .an'd a pitman connected .at' one end to the crankshaft for turning the'same, 'ni'eans for controlling the: direction of rotation of 'the crank-shaft when starting thee'ngine', c'ompris'- ing slidablyl mounted cylinders located odop r posite sides of the connected end of the pitman, piston rods slidable within said cylinders and having extended ends directed toward the connected end of the pitman, heads mounted on the extended ends of said piston rods, resilient means within said cylinders holding said piston rods in an extended positionin which said heads will be projected into the path traversed by the connected end of the pitman, and means for sliding said cylinder to move said heads out of the path traversed by the connected end of the pitman';

3. In'c ombination with an engine having a crankshaft and a-pitman connected at one end '-to the-crankshaftdor turning the same, means for controlling the direction of rotation of the "'crank"shaft"when"starting the engine, comprising slidably mounted cylinders located on opposite sides of the connected end of the pitman, piston: rods -.slidable .within" said cylinders and havingextended ends directed toward the con{ nected end of the p'itma'n'; heads mounted on the extended ends ofsaid piston rods, resilient' means-within' said cylinders holding said piston of the path traversed by the connected end of prises opposed racks formed on said cylinders and 7 having their teeth directed toward one another;

and a manually turnable gear between said racks 1T meshing with the teeth thereof to b'e tu'r'ned in" I one directionor'the other for sliding'the'cylinders in opposite diiections'relative'toone'another.

GERDA TISELL," Erecutria: of the Estate" of Charles Tisell, De-

ceased. s

REFERENCES *CI'IED The followingreferences are of record in the:

file of this patent? the p'itmanjsaid cylinder" sliding'i'neans, com- 46, UNITED ST ATES PZVIE'FJNTEF 7 Number Name-M Date g D. 13,97I -Whitl0ck -June 5,-1883 58,478 r Reynolds Oct. 2,18% 66,527 Sims July 9,1867

l j 68,432- Bickwell 1 Sept.'3,'1867 i 115,073 Lull May 23, 1871 a 314,1-29- i? -Howard Mar. 17; 1885 :3 505,004" Reynolds e- -Sept.-'12, 1893 H 711,494 -Grider i- Oct. 21-; 1902 1,141,323 Dryden June 1, 1915 FOREIGN PATENTS Number Country Date 

